Donald Trump -- I'm Glad Rousey Lost ... 'Not a Nice Person'

Seems Donald Trump and Laila Ali have something in common -- 'cause he also HATES Ronda Rousey ... saying he's glad she got thumped up!

Trump went to Twitter and wrote, "Glad to see that @RondaRousey lost her championship fight last night. Was soundly beaten - not a nice person!"

Of course, the beef could stem from the fact Ronda endorsed Bernie Sanders for president earlier this month -- and ripped Trump along the way.

Back in August, she told CNN ... "I wouldn't vote for [Trump]. I just really wouldn't trust the guy with running my country, that’s all ... I'm not really going to get into specifics of it, but, I mean, I don't want a reality TV star to be running my country."

Donald did have some nice things to say about one athlete this weekend -- Trump supporter Tom Brady -- saying, "Tom Brady just did it again. He is not only a great guy, he is, without question, the BEST quarterback!"